Silica gel desiccant is a highly useful variety of desiccant, available in a range of mesh sizes to meet the
needs of its many possible uses in industry. It does not react with chemicals, and is tasteless, odorless, non-toxic, and
non-corrosive. It is extremely porous and can adsorb a large amount of water due to its vast amount of internal surface area.Since it is non-deliquescent, its size and shape always remain the same, and there are no chemical reactions or byproducts thatresult from the adsorption process. Even when saturated with water, the gel stays free-flowing, and dry. What makes blue indicating silica gel particularly useful is that, as it adsorbs water, it changes color, going from blue to purple to pink as the moisture is adsorbed.
Technical Data ITEM | Specifications | Typical values | |||
Superior Class | First Class | Qualified Class | |||
25ºC Adsorption capacity, % | RH=20%, ≥ | 10.5 | 10.0 | 8.0 | 11.0 |
RH=50%, ≥ | 23.0 | 22.0 | 20.0 | 27.3 | |
RH=90%, ≥ | 34.0 | 32.0 | 30.0 | 36.6 | |
Loss on Heating, ≤ | 2.0 | 4.0 | 6.0 | 1.3 | |
pH value | 4-8 | - | - | 4.7 | |
Specific resistance, Ω·cm ≥ | 3000 | - | - | 6250 | |
Silica, % ≥ | 98 | - | - | 99.0 | |
Qualified ratio of spherical granules, % ≥ | 82 | - | - | 90 | |
Size | Negotiable | Negotiable | Negotiable | 2-5mm | |
Bulk density, g/L ≥ | Negotiable | Negotiable | Negotiable | 778 | |
Note: Qualified ratio of spherical granules is only applicable to fine-pored silica gel |
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